/* 全局样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        /* 主容器 */
        .container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 40px 20px;
        }
        
        /* 英雄区域 */
        .hero {
            text-align: center;
            margin-bottom: 60px;
            animation: fadeInUp 0.6s ease-out;
        }
        
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 20px;
        }
        
        .hero p {
            font-size: 1.2rem;
            color: #666;
            max-width: 700px;
            margin: 0 auto 30px;
        }
        
        /* 功能介绍区域 */
        .features {
            background: white;
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            animation: fadeInUp 0.6s ease-out 0.2s both;
        }
        
        .features h2 {
            font-size: 2rem;
            margin-bottom: 30px;
            color: #333;
            text-align: center;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }
        
        .feature-icon {
            font-size: 1.8rem;
            color: #667eea;
            margin-top: 2px;
            flex-shrink: 0;
        }
        
        .feature-content h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: #333;
        }
        
        .feature-content p {
            color: #666;
            font-size: 0.95rem;
        }
        
        /* 优势亮点 */
        .highlights {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border-radius: 15px;
            padding: 40px;
            margin-top: 40px;
            animation: fadeInUp 0.6s ease-out 0.4s both;
        }
        
        .highlights h2 {
            font-size: 1.8rem;
            margin-bottom: 25px;
            text-align: center;
        }
        
        .highlights-list {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .highlight-item {
            text-align: center;
            flex: 1;
            min-width: 200px;
        }
        
        .highlight-number {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        
        .highlight-text {
            font-size: 1rem;
            opacity: 0.9;
        }
        
        /* 页脚样式 */
        footer {
            text-align: center;
            margin-top: 60px;
            padding: 30px 20px;
            color: #666;
            border-top: 1px solid #eee;
        }
        
        /* 加载指示器 */
        .loading {
            text-align: center;
            padding: 60px 20px;
            color: #667eea;
            font-size: 1.1rem;
        }
        
        /* 错误信息 */
        .error {
            text-align: center;
            padding: 60px 20px;
            color: #f56565;
            font-size: 1.1rem;
        }
        
        /* 动画 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .container {
                padding: 30px 20px;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .hero p {
                font-size: 1.1rem;
            }
            
            .features,
            .highlights {
                padding: 30px 20px;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
                gap: 25px;
            }
            
            .highlights-list {
                flex-direction: column;
                gap: 25px;
            }
        }
/* -------------------------------
   页脚 (footer) 样式优化
------------------------------- */
footer {
  margin-top: 3rem;          /* 与上方内容拉开距离 */
  padding: 2rem 1.5rem;      /* 增加内边距，呼吸感 */
  background: #f9fbfd;       /* 柔和浅灰背景 */
  border-top: 1px solid #e9edf2; /* 极细分隔线 */
  color: #4b587c;            /* 深灰蓝文字，降低对比刺眼感 */
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.95rem;        /* 适中的字体大小 */
  line-height: 1.6;          /* 行距舒适 */
  text-align: center;       /* 内容居中 */
}

/* 页脚内段落间距规整 */
footer p {
  margin: 0.3rem 0;
}

/* 备案链接样式：品牌蓝 + 下划线动画 */
footer a {
  color: #1a73e8;
  text-decoration: none;
  border-bottom: 1px solid transparent; /* 预留下划线位置，悬停时显示 */
  transition: border-color 0.2s, color 0.2s;
}

footer a:hover {
  color: #0d47a1;
  border-bottom-color: currentColor; /* 优雅淡蓝下划线 */
}

/* 修复备案号与前方文字“Rights Reserved.”的粘连问题 —— 增加左间距 */
footer p:last-child a {
  margin-left: 0.4em;
}

/* 移动端适配：缩小边距与字体 */
@media (max-width: 640px) {
  footer {
    padding: 1.5rem 1rem;
    font-size: 0.85rem;
  }
}